TUZAUD01
HZDR, Dresden, Germany
Compared to other cooling techniques laser cooling potentially provides a cooling force that increase with increasing beam energy. Thus, laser cooling will be adopted at future high energy ion storage rings such as SIS 100 at FAIR. In the talk we discuss the fundamentals of laser cooling and the prospects of the technique in the light of recent developments in laser technology and new theoretical investigations on cooling transitions. We present our analysis on the choice of ions for initial test experiments in the light of recent results at ESR and CSRe. The presentation will conclude by analysing the beam dynamics of laser cooled ion beams and from these show how optical diagnostics can complement conventional beam diagnostics.
TUPF03
IMP/CAS, Lanzhou, People's Republic of China
TU Darmstadt, Darmstadt, Germany
GSI, Darmstadt, Germany
HZDR, Dresden, Germany
Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Institute of Radiation Physics, Dresden, Germany
TU Dresden, Dresden, Germany
A test experiment was performed with 12C3+ ion beams at an energy of 122 MeV/u on the CSRe in September 2014. A pulsed UV laser system from HZDR was employed for this test laser cooling experiment. The closed 2s1/2―2p1/2 optical transition at a wavelength of 155.07 nm of the Li-like carbon ions was Doppler-shifted to be resonant with the UV-laser at the wavelength of 257.5 nm in the experiment. The injected number of C3+ ~5×108,which was sufficient for testing laser cooling. Stable operation of the CSRe was observed over several days, including rf-bunching and diagnostic systems. The dynamics of the electron-cooled and RF-bunched ion beams were investigated systematically. However, first results did not yet indicate a strong interaction of the laser with the ions. Further data analysis is currently in progress. We will present the experimental results on this workshop, including Schottky spectra of electron-cooled and rf-bunched ion beams, fluorescence signals observed by the UV-sensitive PMT and CPM, and the planning of the upcoming laser cooling experiment at the CSRe.
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